Vince Gill, left, and Keith Urban perform during the All for the 

Vince Gill, left, and Keith Urban perform during the All for the Hall concert on Tuesday, April 10, 2012, in Nashville, Tenn. The concert is a benefit for the Country Music Hall of Fame and Museum. (AP Photo/Mark Humphrey)
Associated Press
Vince Gill, left, and Keith Urban perform during the All for the Hall concert on Tuesday, April 10, 2012, in Nashville, Tenn. The concert is a benefit for the Country Music Hall of Fame and Museum. (AP Photo/Mark Humphrey)
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